MITSUBISHI COLT 2006 Service Manual Online

BASE ENGINE
ENGINE MECHANICAL <4A9>11A-33
TIMING CHAIN CASE
AK305243
Engine support bracket
AB
The engine supp ort bracket, the oil pu mp a nd the
relie
f valve are in tegrate d as we ll as water chamber
of the wat
e r pump.

GROUP 11
ENGINE
CONTENTS
ENGINE MECHANICAL <4A9> . . . . . . . . . . . . . . . . . . . . . . . . .11A
ENGINE MECHANICAL <4G1> . . . . . . . . . . . . . . . . . . . . . . . . .11B

GROUP 27
REAR AXLE
CONTENTS
GENERAL INFORMATION . . . . . . . .27-2

GENERAL INFORMATION
REAR AXLE27-2
GENERAL INFORMATION
M2270000100382
The rear axle has the following features:
•The wheel bearing is a unit ball bearing (dou-
ble-row angular contact ball bearing) for reduced
friction.
•The wheel bearing incorporates magnetic
encoder for wheel speed sensing.
•The rear wheel hub assembly combines the hub,
wheel bearing and oil seal in a single unit for
fewer parts, better durability, improved assembly
precision, and better structural organization.
SPECIFICATION
ItemSpecification
Wheel bearingTy p eUnit ball bearing (double-row angular
contact ball bearing)
NOTE: The wheel bearing is part of the hub, therefore its size is not listed here.
CONSTRUCTION DIAGRAM
AC402053AC600026AC600074
AD
Rear hubOil seal
Wheel bearing Magnetic encoder Rear hub Oil seal
Wheel bearing Magnetic encoder
<4G1> <4A9>

GROUP 34
REAR SUSPENSION
CONTENTS
GENERAL INFORMATION . . . . . . . .34-2

GENERAL INFORMATION
REAR SUSPENSION34-2
GENERAL INFORMATION
M2340000100825
Newly developed H-shaped torsion beam type sus-
pension has been introduced.
•The coil spring is installed under the rear floor,
the torsion beam and arm assembly is installed in
front of the spare tyre house, and the shock
absorber is installed outside, so that the large
cabin space is achieved.
•The arm bushing with the toe control function is
adopted to optimise the tyre steering angle using
the bushing deflection caused by lateral force
and longitudinal force generated at cornering, so
that the good cornering performance is secured.
•The layout of shock absorber is optimised for
smooth riding.
•Long wheel stroke secures sufficient road holding
quality.
•The hub-integrated unit bearing is adopted for the
wheel bearing for sufficient suspension rigidity
(Refer to GROUP 27, Rear Axle
P.27-2).
•The dumping characteristic of shock absorber
has been changed. <4G1>
•The urethane bump stopper has been adopted to
improve the linearity. <4G1>
•Torsion beam rigidity has been improved <4G1>
CONSTRUCTION DIAGRAM
AC405533AD
Coil spring
Shock absorber
Torsion beam and arm assembly
Arm bushing
Torsion bar
Section A – A
<4G9>
A
A Torsion beam and arm assembly
Section A – A
<4G1>
Torsion beam and arm assembly

GENERAL INFORMATION
REAR SUSPENSION34-3
SPECIFICATIONS
SUSPENSION SYSTEM
ItemSpecification
Suspension typeTorsion beam suspension
WHEEL ALIGNMENT
ItemSpecification
Camber−1°
Toe-inAt the centre of tyre tread mm3
Toe-angle (per wheel)0°09'
COIL SPRING
Item4A94G1
Wire diameter mm1011
Average outside diameter mm75 − 107 − 75111
Free length mm301283

GROUP 12
ENGINE
LUBRICATION
CONTENTS
GENERAL INFORMATIO N . . . . . . . .12-2
OIL PUMP<4A9> . . . . . . . . . . . . . . . .12-4
RELIEF VALVE<4A9> . . . . . . . . . . . .12-4
OIL SCREEN<4A9> . . . . . . . . . . . . . .12-5
OIL FILTER<4A9> . . . . . . . . . . . . . . .12-5
OIL PAN<4A9> . . . . . . . . . . . . . . . . . .12-6
OIL LEVEL GAUGE, OIL FILLER CAP,
OIL DRAIN PLUG<4A9> . . . . . . . . . .12-6
OIL COOLER<4G1> . . . . . . . . . . . . . .12-7

GENERAL INFORMATION
ENGINE LUBRICATION12-2
GENERAL INFORMATION
M2120000100175
LUBRICATION SYSTEM SCHEMATIC<4A9>
AK402024AC
Oil screenOil pump
Timing chain case
oil passage
Cylinder block
oil passage(right side) Oil filter
Relief valve
Cylinder block
oil passage
(main gallery)Crankshaft
journal
Exhaust camshaft
journal
Oil pressure switch
Cylinder head
oil passage
No.1 Camshaft
journal
Intake camshaft
journal Crankshaft
pin
The lu
brication system of th e 4A9 en gine has a full
pressure de
livery system and a full flow oil filtering
system. The o
il stored in the oil p an is pumped
up/out
by th e oil pump. Af ter the relie f valve regu
-
lates the oil p r essure, th e oil is delivere d to th e cylin-
der block through the o il f ilte r , the o il p a ssag e of the
cylinde
r blo ck a nd the each jou r nal o f the crankshaf t.
The oil del ivered to the ea ch jo urnal of th e cranksh af t
is supplied
to the pin th rough the in ner p a ssage of
the crankshaf
t.
The oil delivered to the cylinder head is supplied t o
the ea
ch journa l of the camshaf t th rough the cylinde r
head.

GENERAL INFORMATION
ENGINE LUBRICATION12-3
LUBRICATION SYSTEM SCHEMATIC<4G1>
AK402151AC
Oil screen
Oil pump
Oil filter
Relief valve
Cylinder block
oil passage
(main gallery)Crankshaft
journal
Exhaust camshaft
journal
Oil pan Oil pressure switch
Cylinder head
oil passage
No.1 Camshaft
journal
Intake camshaft
journal Crankshaft pin
PistonOil jet
Oil cooler
Turbo charger
Lash adjuster Cam
To correspond with the impr oved engine outp u t per-
formance b y emplo y ing the tu rboch a rger , the oil
cooler and
the oil jet are u s ed for 4GI engine.